Calling device.



A. H. DYSON.

CALLING DEVICE.

APPLICATION FILED MAR. 8. 1915.

1,226,953. Patented May 22,1917.

2 SHEETS-SHEET l- Wi/nesses: v //7 v emor:

M A/fred hf flyson.

A. H. DYSON.

CALLING DEVICE.

APPLICATION FILED MAR. 8. 1915.

1,226,953. Patented May 22, 1917.

2 SHEETS-SHEET 2- W/lnesses: /m/e/7/or. @917. M. I A/fred HDy-so'n/ W I W UNITED STATES PATENT OFFICE.

.aLEnEn n. DYSON, OE mOErcLAIR, nEw .TERSEY, c ema, BY MESNE ASSIGNMENTS, r wEsrEnN LEcTRIO COMPANY, INCORPORATED; A CORPORATION OF NEW YORK.

. CALLING DEVICE.

Specification of Letters Patent.

Patented May 22, 1917'.

. Application flled' March a, 1915. Serial No. 12,809.

and more particularly to impulse senders employed in automatic and semi-automatic telephone systems for the purpose of controlling the operation of associated switch mechanisms.

The object of this invention is to provide.

a calling device which is simple in construction and in which the possibility of inter-- iering with the proper operation of the dil calling device and the setting of the switch mechanisms is reduced to a minimum.

A calling device made in accordance with this invention may have embodied therein one, some, or all of the following features:

it may have a single power means or me tor spring which first returns the manually operated member 'or dial to normal and then operates the impulse sendingmechanism, the dial preferably being locked in normal position during the sending out of impulses.

instead of or in addition to locking the dial in normal position during the sending operation, the member carrying the digit characters may be arranged to move with the dial in the setting operation and to restore completely only when the sending op-- eration is concluded.

According to another feature of this invention, means, such as a finger lever, operated only at the completion of the setting operation, opens during the subsequent sending operation contacts which normally shunt the impulse sending contacts.

in the drawings Figure 1 represents a plan view of the dial; I

Fig. 2 is a side elevation of the calling device;

Fig. 3 is a sectional plan view on lines 3-3 of Fig. 2, certain parts being omitted for the sake of clearness;

Fig. 4 is a sectional view on lines 4 -4 of Fig. 1, certain parts being omitted for the sake of clearness;

Fig. 5 is a bottom view of Fig. 2; a

Fig. 6 is sectional of Fig.2;

view on lines '6-0 Fig. 7 is a. telephone substation circuit arrangement used in connection with this calling device;

Fig. 8 is a plan view of a modification of the calling device shown in Figs. 1-6, with parts broken away;

Fig. 9 is a sectional 9-9 of Fig. 10;

Fig. 10 is a side elevation with certain parts in section and others omitted for the sake of clearness; and

Fig. 11 is a substation circuit arrangement used with the modified dial sender.

Referring to Figs. 1 to 7 representing one embodiment of this invention, 1 and 2 represent plates held together by means of studs'3, 3, 3. These plates constitute a rigid frame for the moving parts of the device. Shaft 4 extends lthroklgh suitable hearings in plates 1 and 2. On the free end of shaft 4, above plate 1, is fastened, by.

plan view on lines- Loosely mounted on shaft 4 is a gear 4 wheel 10 and a pinion 11 carrying ratchet wheels 12 and 13. A sleeve 14 loosely mounted on shaft 4 carries rigidly mounted thereon a-gear wheel 15. One end ofa motor spring 16 contained in a stationary cup 17 is fastened to sleeve .14, the other end of 19 is loosely mounted on shaft 4 and carries a downwardly projecting pin 21 adapted to be engaged by pin 9 of disk 7 A spindle 22 journaled in plates 1 and 2 carries a pinion 23 meshing with gear 15. and a gear wheel 24 meshing with pinion 11. Spindle 25 journaled in plate 2 and bracket 26 carries a pinion 27 meshing with gear 10, and a worm gear 28 meshing with worm 29 of a speed regulating governor 30 pivoted between projections 31 and 32 of plate 2.

A pawl 33 carried'on disk 7 is adapted when moved away from normal position to engage, under the pressure of spring.34,

the teeth of ratchet wheel 12. A pin of disk 7' limits the return movement of pawl Spindle 22 when in engagement with Z the projection of pawl 33-causes sald pawl to disengage the teeth of ratchet wheel 12. Pin 35 and spindle 22 serve at the same time'to limit the backward movement of disk 7 and the parts fastened thereto.

Cooperating with disk 1 7 and impulse wheel 19 is a leaf spring 36 having a bent-up portion 37. The leaf spring is wide enoughto engage the periphery of both the impulse .wheel and the disk. As long as disk'7 is out of its normal position, projection 37 of leaf spring 36 rests on the periphery of disk 7 and for this reason ratchets of impulse wheel 19 cannot vibrate this spring. When, however, disk 7 is in its normal position the bent-up 'portion 37 of spring 36 drops into notch' 8 of disk 7, and spring 36 is vibrated by the rotating impulse wheel 19. The vibration of spring 36 causes the opening and closing of contact springs 38 and 39, interruptingthereby thesubscribers line circuit (Fig. 7). In response to these interruptions impulses are sent out to control a switching mechanism. Springs 36, 38 and 39 are suit-.

. ably mounted upon but insulated from a plate 40. Mounted on the same plate 40 is a leaf spring 41 having a bent-up portion which engages a pawl 42 mounted on plate 1. Pawl 42 in its normal position rests on pin 21 of impulse wheel 19. In this .position of the pawl, spring 41 is separated from spring 39. When, however, pin 21 is removed from.

under pawl 42 spring 41 en ges spring 39 and short-circiiits the subscriiiers telephone set (Fig. 7).

Other details of they mechanism will more fully appear from the following description 2 of the operation of calling device.

The operator desiring to send out, for instance, a series of five impulses, engageswith his finger the finger hold representing number 5, and rotates dial 6 in a clockwise direction until his finger reaches stop 43 fastened to plate 1 by means of screws44, and then removes his finger. from the hold. In response to the movement of dial 6, shaft 4 and disk 7 fastened thereto are moved 'ina clockwise direction. Disk 7 carries pawl 33 away from spindle 22 and said pawl is brought into-engagement with the teeth of ratchet wheel 12. Further, said disk 7 engages with its pin 9 pin 21 of im ulse wheel 19 and causes the rotation of t e impulse wheel in a clockwise direction. Impulse wheel 19 being fastened by means of studs 18 togear wheel 15 causes in turn said gear wheel and sleeve 14 to revolve in a clockwise direction. Sleeve 14 beingrotated, motorsprin'g 16 is wound up. The rotation of 7 gear wheel 15 is transferred to pinion 23 and thence through spindle 22 to gear wheel 24 and pinion 11, The relation of said gears and pinions is such that one complete revolution of gear 15 causes pinion 11 to erform two complete revolutions. There ore, in response to the clockwise rotation of the gear 15, pinion 11 and ratchet wheels 12 and 13 fastened thereto are rotated twice the an-: gular distance of the displacement of dial 6, isk 7 and wheels 19 and 15. The pawl 33 engaging the teeth of ratchet wheel 12, will not interfere with the rotation of this ratchet wheel, but will rise and fall over its teeth. Corresponding to each finger hold of dial 6 tw notches are provided on impulse wheel 19. In the present case, dial .6 being dis-. placed ,to the distance of five finger holds, impulse wheel 19 is displaced an'equal distance, i. e. to the distance of ten notches.

';A sprin rises and falls over the teeth of the rotating ratchet wheel 11. Gear'wheel 10 remains stationary and does not cause the operation pressed pawl 45, mounted on I gear whee 10 loosely carried on shaft 4,

away from its normal position, and said pawl,'responding to the tension of spring 41, moves inwardly until its edge engages spindle 22. Spring 41 is thus allowed to engage spring 39 causing thereby, as above stated, the short-circuiting of the subscrib-- ers telephone set.

Upon the release of dial 6 the power stored up in spring 16 causes the counter-clockwise rotation of sleeve 14, gear wheel 15 and the impulse wheel 19 connected Through the agency of pinion 23 and gear 24, ar wheel 15 transmits the movement to pinion 11 and to ratchets 12 and 13 carried thereon. Due to the above mentioned type of transmission, pinion wheel 11, and ratchet wheels 12 and 13 are rotated at. a double speed with respect to impulse wheel 19 and gear wheel 15. Pa'wl 33, being in engagement with a tooth of ratchet wheel 12 moves with this wheel and causes thereby the counter-clockwise rotation of disk 7. Disk 7 being rotated, shaft 4 and dial 6 are also rotated in a counter-clockwise direction. In the same manner ratchet wheel 13 causes, through the agency of spring-pressed pawl 45, the counter-clockwise rotation'of gear wheel 10. This movement of wheel 10 is transmitted through pinion 27, shaft 25, worm wheel 28 and worm'29 tothe speed go ernor 30. The speed governor being thus coupled to the impulse wheel 19 regulates the speed thereof according to its adjustment. It will be seen therefore that all the parts (dial 6, disk 7, etc.), which are under the direct control of pinion 11, are rotated at twice the speed with respect to impulse wheel19 and gear wheel 15. Thus,-

thereto.

rotation of impulse wheel 19 and disk 7, five notches of theimpulse wheel pass by leaf tated at a double speed with respect to im-.

spring 36 without actuating the; same.

Disk 7 is moved'in a counter-clockwise directionuntil the projection of pawl 33 engages spindle 22 and the pawl is caused to release the tooth ofratchet wheel 12. Pawl 42 allows pin 9 of disk 7 to pass by, but as pin 21 of impulse wheel 19v has not yet returned to its normal position(disk 7 being ropulse wheel 19), pawl 42 moves again into its actuated position, locking disk 7 and thereby dial 6 against forward movement.

Disk 7 being in its. normal position, the upturned end 37 of leaf spring 36 falls into notch 8 of the disk, and thereby impulse wheel 19, during the rest of its movement (five notches), causes spring 36 to oscillate I and close and open thereby contact sprin 38 and 39 five times. In response to eac closure of these contact s rings an impulse is transmitted over the su scribers line, the

" number of impulses being'determined by the the set position of dial 6. When impulse wheel 19 reaches its normal position, pin 21 engages pawl 42 restoring the same to its normal position. Contact 41 is separated now from contact '39 and the shunt removed thereby from the subscribers telephone apparatus. Disk 7 and dial 6 are now unlocked and ready for further operation. A modified form of the impulse sender embodying the features of thisinvention is represented in Figs. 8-11. This modified device has a few additional elements over those shown in Figs. 1-7.

A plate is fastened by means of screw 51 to hub 14 between dial 6 and frame 1. The characters 1-0 carried on plate 50 are visible through the finger holds of dial 6, and each of said numerals corresponds to one finger hold.

Betweenplate 50 and frame 1 is provided a lever' 52 having an extension 53. The extension 53 is located closely beneath dial 6 adjacent to stop 43, and is connected with lever 52 in such a' manner that it will not interfere with the free rotation of the interpositioned plate 50. A shaft 54 journaled between frame land bracket 26 serves as a pivot for lever 52. A coiled spring 55 wound around shaft 54 tends to keep lever 52 and thereby extension 53 in the position shown in Fig. 8. Fastened to shaft 54 is an arm 56 carrying a projecting pin 57.

Pivoted in frame 1 is a lever 58. A notched depression 59 of lever 58 is adapted to be engaged by pin 57. Lever 58 carries an insulated stud 60 adapted to engage coiiperating contact springs 61 and 62. Springs 61 and 62 are so connected to the substation circuit arrangement that when closed they form a shunt-around contact springs 38 and 39, and thereby in this position ofv springs 61 and 62 the actuation of springs 38 and 39 would not result in the sending out of impulses (Fig. 11). Should the operator fail to actuate lever 52 by releasing dial 6 before stop 43 is reached; due to the arrangement of springs 61 and62, no impulses would be sent out. Without these springs less impulses would be sent out than designated by the selected finger hold, in case of the operator letting go the dial before the stationary stop is reached. I V

f A projection 63 of lever 58 is normally engaged by a catch 64 carried on ear-wheel 15. The operation of this modi ed sender is substantially the same as that of the sendershown in Figs. 17. 'In this case, however, before the operator reaches stop 43. with his finger when moving dial 6, he actuates lever 52 by engaging member 53.

' In response to the actuation of dial 6, gear wheel 15 is moved out of its normal. position, disengaging thereby extension 63 of lever 58. Under the tension of spring 61 lever 58 is actuated and when theoperators finger in engagement with extension 53 of lever 52 reaches stationary stop 43, arm 56 is in a position in which pin 57 drops into notch- 59 of lever 58. Arm '56 and thereby lever 52 and lever 58 remain locked in this actuated position. Contact springs 61 and 62 being separated, the sending out of impulses proceeds in the same manner as described in connection with the sender represented in Figs. 1-7.

Plate 50 being attachedto hub 14 rotates in response to the forward movement of dial 6, with impulse wheel 19 and gear wheel.15. As above described, after the operator releases the dial, dial -6 returns to normal at a double speed with respect to impulse wheel 19 and gear wheel 15. As plate 50 rotates with these latter mentioned wheels it will be seen that after dial 6lreaches its normal position plate 50 'is still in rotation and ro-' are again closed, and arm 56 being unlocked coiled spring 55 moves lever 52 and arm 56 back into their original positions.

While the setting member of this calling device is shown and claimed as a dial, it will be apparent that this invention is applicable to calling devices having manually operable setting members of widely varying character, such as a movable arm, etc;

What is claimed is:

1. In a-callin device, a movable dial, an impulse transmltting mechanism arranged for operation responsive to the movement of said dial, a single ower means for successively restoring said dial and actuating said mechanism, and means for locking said dial against movement during the actuation of said mechanism. g 2. In a calling device, a movable dial, an impulse transmitting mechanism arranged for operation responsive to the movement of said dial, a motor-spring wound 'u in response to the adjustmentof said mec anism, and means controlled by the wound-up motor spring for restoring said dial and for operatin thereafter said impulse transmitting mec anism.

3. In' a calling device, a movable dial, an impulse transmitting mechanism set responsive to the movement of said dial, means for ,restoring said dial and mechanism, and

' coiiperatin means for operating said impulse transmitting mechanism durin apart of its restoring movement in accor ance with the set position of said dial.

4. In a calling device, amovable dial, a

series of finger holds for actuating saidtdial, an impulse transmitting mechanism adapted to be arranged for operation in response to the movement of said dial, cooperating contacts, a single power means for restoring said dial and for operating said mechanism and means operative after the restoration 0% said dial to actuate said contacts in accordance with the selected finger hold; v

5. In a calling device, a'movable dial having a plurality of operating positions, an impulse mechanism adapte to be set in accordance with the set position of said dial, contacts, a single power means for restoring said dial and said impulse mechanism .to their normal positions, means for actuating said contact springs subse-' quently to the restoration of said dial and during the restoration of said mechanism, and means for locking said dial while said contacts are coiiperating.

6. In a calling device, a movable dial, an

impulse sending mechanism set in response to the movement of said dial, power means for simultaneously restoring said mechanism and said dial sa1d dial being restored at a greater speed than said mechanism, and means for transmitting impulses during the restoration of said mechanism after saiddial has reached its normal position.

7. In a calling device, a movable dial, an impulse sending mechanism set'in response to the movement of said dial, a single power means for restoring said dial and said mechanism, said dial being restored at twice the Y return movement 0 messes speed of said mechanism, cotiperating contacts actuated durin the second half of the said mechanism, and means for locking said movable dial while said contacts, are coeperating.

8. In a callingdevice, a dial, a plurallty of finger holds for actuating said dial, a

disk, an impulse wheel, a motor spring adusted in response to the actuation of said dial, a ratchet wheel adapted to be moved to twice the angular displacement of said dial in response to the actuation thereof, means under the joint control of said ratchet wheel and said motor spring to restore to normal said dial, disk and impulse wheel, means for doubling the speed of the return movement of said dial and disk with re- 'spect to said impulse wheel, cooperating contacts actuated during the second half of the return movement of said impulse wheel after said disk and dial have reached their normal position, and means for locking said dial in its normal position while said contacts are cooperating.

9. In a calling device,'a movable dial having a plurality of operating positions,'charactors for indicating the operating positions to which said dial can be set, an impulse transmitting mechanism set in accordance with the set position of said dial, power means for restoring 'said member-to normal, means for operating said impulse transmitting mechanism, and-means operative during the return movement of said dial and during the operation of said impulse transmitting mechanism to prevent said characters from appearing at their normal position with respect to said dial.

10. In a calling device, a movable dial,

a plurality of finger holds for actuating fin abli plate carrying digit characters to designate said finger holds, an impulse transmitting mechanism, means for setting said plate and said mechanism in accordance with the set positions of said dial, power means for restoring said dial to normal and for operating said mechanism, means for locking said dial during the operation of said mechanism, and means for moving said plate while said dial is locked.

12. In a calling device, a movable dial,

finger holds for actuating said dial, a movable plate carrying characters to designate.

said finger holds, an impulse transmitting mechanism, means for setting said plate and said mechanism in accordance with the actuated position of said dial, means for restoring said dial at a greater speed than said plate and said impulse transmitting mechanism, and cooperative contacts actuated' during the return movement of said mechanism.

13. In a calling device, a movable dial, a plurality of operating positions for said dial, means to predetermine an operating position for said dial, an impulse transmitting mechanismiset in accordance with the set position of said dial, a single power means for restoring said dial and said mechanism, cooperating contacts adapted to be actuated by said mechanism, and means to I prevent the actuation of-said contacts if said dial has not been moved to the predetermined operating position.

14. In a calling device, a movable dial having a plurality of operating positions, a lever actuated during the setting of said dial, an impulse transmitting mechanism set in accordance with the operated position of said dial, a single power means for restoring said dial and said mechanism, normally shunted contact springs actuated during the return movement of said mechanism, and means controlled by said lever to remove the shunt from said contact springs. 1

'In witness whereof, I hereunto subscribe my name this 5th day of March A. D., 1915.

ALFRED I-I. DYSON.

Witnesses:

E. EDLER, K. L.'STAHL. 

